Issue #1078618 by Sutharsan, Takafumi: Add string context to Scale.

core/modules/number/lib/Drupal/number/Plugin/Field/FieldFormatter/NumberDecimalFormatter.php

@@ -46,7 +46,7 @@ public function settingsForm(array $form, array &$form_state) {
     );
     $elements['scale'] = array(
       '#type' => 'select',
-      '#title' => t('Scale'),
+      '#title' => t('Scale', array(), array('decimal places')),
       '#options' => drupal_map_assoc(range(0, 10)),
       '#default_value' => $this->getSetting('scale'),
       '#description' => t('The number of digits to the right of the decimal.'),

core/modules/number/lib/Drupal/number/Plugin/Field/FieldType/DecimalItem.php

@@ -78,7 +78,7 @@ public function settingsForm(array $form, array &$form_state, $has_data) {
     );
     $element['scale'] = array(
       '#type' => 'select',
-      '#title' => t('Scale'),
+      '#title' => t('Scale', array(), array('decimal places')),
       '#options' => MapArray::copyValuesToKeys(range(0, 10)),
       '#default_value' => $settings['scale'],
       '#description' => t('The number of digits to the right of the decimal.'),